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10. CHECK AND ADJUSTMENTS
■ Horizontal Rotation Cone Error
• Perform the following check after completing the check for "■ Horizontal Rotation Grade Error".
1. Set up the laser centered between two walls approximately 50 m
(164 ft) apart. Orient the instrument so one axis, either X or Y, is
facing the walls. Grade should be set to 0% in both axes.
2. Locate and mark the position of the RL-HV beam on both walls
using the LS-80X.
3. Turn off the RL-HV and move the RL-HV closer to wall A (1 m to 2
m /3 ft to 6 ft).
Do not change the axis orientation of the RL-HV. Turn the RL-HV
on.
4. Again locate and mark the position of the RL-HV beam on both
walls using the LS-80X.
5. Measure the distance between the first and second marks on each
wall.
If the difference between each set of marks is less than ±5 mm (±7/
32 of an inch), no error exists.
• If the difference between [wall A]-side and [wall B]-side exceeds ±5 mm (±7/32 of an inch), contact your local
dealer.
Cone Error
Approx. 50m
Wall A
Wall A Wall B
Wall B
Standard
location
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